Engineering Papers⌕ Search

SEARCH · Engineering Papers

Results for “space networking”

Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 1,297 records · Page 72
All sourcesNASA NTRSDOE OSTI
NASA NTRS1977

Publications of the Jet Propulsion Laboratory 1976

The formalized technical reporting, released January through December 1975, that resulted from scientific and engineering work performed, or managed, by the Jet Propulsion Laboratory is described and indexed. The following classes of publications are included: (1) technical reports; (2) technical memorandums; (3) articles from bi-monthly Deep Space Network (DSN) progress report; (4) special publications; and (5) articles published in the open literature. The publications are indexed by: (1) author, (2) subject, and (3) publication type and number. A descriptive entry appears under the name of each author of each publication; an abstract is included with the entry for the primary (first-listed) author. Unless designated otherwise, all publications listed are unclassified.

Source record↗
NASA NTRS1977

Viking mission support

Statistics listing the Deep Space Network tracking and command support and the discrepancy report status for 1 January through 28 February 1977 are presented in tables. The initial Viking extended mission period of normal DSN support, following the nonstandard operations during the solar conjunction period is included. Operational testing subsequent to the MK III data system installations at DSS 12, 44, and 62 during this period are also discussed.

Johnston, D. W. H.↗
NASA NTRS1977

Pioneer mission support

Activities within the Deep Space Network in support of the Pioneer Project's in-flight spacecraft during the period December 1976 through March 1977 are reported. The amount of tracking coverage provided by the network and a summary of operational testing ot the Mark III Data Subsystems are presented.

Adamski, T. P.↗
NASA NTRS1977

Helios mission support

Deep Space Network coverage of Helios-1 and Helios-2 from Feb. 1 through Apr. 15, 1977 is presented in tabular form. Mark III data system (MDS) performance and station modifications for MDS configuration are discussed. Cross support for Helios operations by DSN and STDN is described and their downlink performances compared.

Goodwin, P. S.↗
NASA NTRS1977

DSN radio science system description and requirements

The data system created to collect the functions performed by the Deep Space Network in support of spacecraft radio science experiments is described. Some of the major functional requirements presently being considered for the system are delineated.

Mulhall, B. D. L.↗
NASA NTRS1977

VLBI Validation Project

Two training and three operational Deep Space Network experiments conducted in support of the very long baseline interferometry (VLBI) validation project are reported. Vector measurements using common benchmark locations at continental distances (Goldstone, Haystack, and the McDonald Observatory) with an accuracy goal on the order of 5 cm. were obtained and compared with laser ranging systems data.

Ross, W. J.↗
NASA NTRS1978

DSN ground communications facility

A functional description of the ground communications facility and its relationships with other elements of the Deep Space network and the world-wide NASA communications network (NASCOM) is presented together with development activities and goals and comments on implementation activities in support of flight projects.

Evans, R. H.↗
NASA NTRS1978

Viking extended mission support

The status of the Viking Deep Space Network Mark 3 '77 data subsystem implementation project and related testing at DSS 42/43 from 1 September through 31 October 1977 are reported. The Viking DSN discrepancy reporting system, Viking command support, tracking support, and periodic tests conducted with the Viking spacecraft are also discussed.

Howe, T. W.↗
NASA NTRS1978

Preliminary design work on a DSN VLBI correlator

The Deep Space Network is in the process of fielding high-density digital instrumentation recorders for support of the Pioneer Venus 1978 entry experiment and other related tasks. It has long been obvious that these recorders would also serve well as the recording medium for very long base interferometry (VLBI) experiments with relatively weak radio sources, provided that a suitable correlation processor for these tape recordings could be established. The overall design and current status of a VLBI correlator designed to mate with these tape recorders are described.

Lushbaugh, W. A.↗
NASA NTRS1978

Viking extended mission support

The Deep Space Network (DSN) support of Viking spacecraft activities and the DSN Viking command and tracking support are reported. The status of DSN Mark 3 data (MDS) subsystem implementation project related Viking testing is included.

Gillette, R. L.↗
NASA NTRS1978

Pioneer Venus 1978 mission support

The Tracking and Data System and Deep Space Network preparation and support activities for the Pioneer Venus 1978 Mission are described including prelaunch preparations. The status of multiprobe entry preparations and the differential long base interferometry wind measurement experiment are summarized.

Miller, R. B.↗
NASA NTRS1978

Examination of the DSN X-band weather specification

Effects of weather on Deep Space Network system performance at X-band are examined by comparing a record of 64 meter system noise temperatures with weather observations taken at approximately the same times and places.

Source record↗
NASA NTRS1978

CCM implementation status

Activity invested in the preparation of planning the control and computational module (CCM) implementation into the Deep Space Network (DSN) is described. A de facto standard, selection of a standard CCM family, and policies to govern use of CCMs in DSN application are among the topics considered.

Mancini, R. A.↗
NASA NTRS1978

Viking extended mission support

Deep Space Network support is detailed for Viking spacecraft activities and the Viking command and tracking system. Viking DSN Mark 3 data subsystem implementation related testing is also discussed.

Gillette, R. L.↗
NASA NTRS1978

Helios mission support

Deep Space Network support of Helios mission operations includes information on Helios-1's seventh perihelion, Helios-2's fifth perihelion, and other mission-related activities.

Goodwin, P. S.↗
NASA NTRS1978

Establishing a celestial VLBI reference frame. 1: Searching for VLBI sources

The Deep Space Network is currently engaged in establishing a new high-accuracy VLBI celestial reference frame. The present status of the task of finding suitable celestial radio sources for constructing this reference frame is discussed. To date, 564 VLBI sources were detected, with 166 of these lying within 10 deg of the ecliptic plane. The variation of the sky distribution of these sources with source strength is examined.

Preston, R. A.↗
NASA NTRS1978

JPL 2-to-the-20th-power channel 300 MHz bandwidth digital spectrum analyzer

A million (two to the 20th power) channel, 300 MHz bandwidth, digital spectrum analyzer was considered. The design, fabrication, and maintenance philosophy of the modular, pipelined, fast fourier transform (FFT) hardware are described. The spectrum analyzer will be used to examine the region from 1.4 GHz to 26 GHz for radio frequency interference which may be harmful to present and future tracking missions of the Deep Space Network. The design has application to the search for extraterrestrial intelligence signals and radio science phenomena.

Morris, G. A., Jr.↗
NASA NTRS1978

The gravitational wave detection experiment: Description and anticipated requirements

The experiment to detect gravitational waves in ultraprecise two-way Doppler data is described, as are the anticipated requirements for the Deep Space Network, the spacecraft, and the data processing system. The special feature which allows the usage of ultraprecise Doppler data for the possible detection of gravitational waves is a unique three-pulse signature which is a function of the spacecraft, earth, and gravitational wave propagation direction geometry. The pulses (fractional frequency shifts) result from effects which are conveniently described as follows: Clock speed-up (earth only effect) and buffeting (equal earth and spacecraft effect).

Berman, A. L.↗